US8031070B2 - Automated system for producing location-based inventories - Google Patents

Automated system for producing location-based inventories Download PDF

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Publication number
US8031070B2
US8031070B2 US11/847,744 US84774407A US8031070B2 US 8031070 B2 US8031070 B2 US 8031070B2 US 84774407 A US84774407 A US 84774407A US 8031070 B2 US8031070 B2 US 8031070B2
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Prior art keywords
rfid
location
transponders
interrogator
transponder
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US11/847,744
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US20080055088A1 (en
Inventor
Bruno Fabre
Nathalie CHATEAU
Adrien VALLET
Guy Venture
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NBG ID SAS
Quadient Technologies France SA
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Neopost Technologies SA
NBG ID SAS
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Assigned to NEOPOST TECHNOLOGIES, NBG ID reassignment NEOPOST TECHNOLOGIES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHATEAU, NATHALIE, FABRE, BRUNO, VALLET, ADRIEN, VENTURE, GUY
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
    • B65G1/02—Storage devices
    • B65G1/04—Storage devices mechanical
    • B65G1/137—Storage devices mechanical with arrangements or automatic control means for selecting which articles are to be removed
    • B65G1/1371—Storage devices mechanical with arrangements or automatic control means for selecting which articles are to be removed with data records
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/0755—Position control; Position detectors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/08—Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
    • G06Q10/087—Inventory or stock management, e.g. order filling, procurement or balancing against orders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2209/00—Indexing codes relating to order picking devices in General
    • B65G2209/04—Indication location means

Definitions

  • the present invention relates to the field of logistics and of storage of various objects and it relates more particularly to the inventory of objects warehoused in general stores, warehouses, workshops, libraries or any other places of storage.
  • an inventory system is known that is based on the use of RFID indicators placed on the articles to be inventoried and designed to interact with an RFID reader moving amongst these indicators and interrogating each of them in turn.
  • the movement of the reader is supposed to be carried out continuously in the three dimensions of the space via a set of cables and pulleys.
  • the object of the present invention is to alleviate this disadvantage by proposing an automated system that is both simple and economical for reliably and quickly producing an inventory making it possible to locate objects.
  • This object is achieved by a system for producing location-based inventories of objects each furnished with an RFID transponder designed to interact with an RFID reader/interrogator and placed at different locations of a warehousing structure consisting of a plurality of rows supported by vertical uprights, characterized in that each of the uprights of this warehousing structure is furnished at each of the rows with an RFID location transponder and in that it comprises processing means for producing a location-based inventory of the objects present on the said warehousing structure according to the information received from the transponders.
  • each of the beginning uprights and end uprights of a row is also furnished with a lock-on marker designed to interact with a lock-on device associated with the said RFID reader/interrogator. Therefore, the lock-on device makes it possible to ensure an optimum read.
  • the system comprises a presence detector to indicate or not the presence of an object in each of the locations of the said warehousing structure.
  • the said RFID reader/interrogator, the said presence detector and the said lock-on device are mounted on a forklift truck designed to pass in front of each of the rows of the said warehousing structure.
  • the said lock-on device comprises an optical transceiver assembly and the said presence detector comprises an ultrasound sensor.
  • the said processing means may consist of a remote management data processing assembly to which the information received from the transponders that is necessary for producing the location-based inventory is retransmitted by the said RFID reader/interrogator from wireless transceiver means.
  • the present invention also relates to a method for producing a location-based inventory of objects each furnished with an RFID transponder designed to interact with an REID reader/interrogator and placed at different locations in a warehousing structure consisting of a plurality of rows supported by vertical uprights each comprising at each of the rows an RFID location transponder, the said method consisting in moving the said RFID reader/interrogator in front of each of the rows of the said warehousing structure in turn and, during this movement, in interrogating and reading the data received from the RFID transponders of the said objects and the data received from each of the RFID location transponders, and from this reading in determining the location of each of the said objects in the said warehousing structure.
  • the said data acquisition is disabled for the time necessary for the RFID reader/interrogator to pass from one row to another.
  • a first filtration is carried out on the data received from the transponders by deleting the spurious reads and by retaining only the majority reads.
  • a second filtration is also carried out consisting in generating a weighted average of the reads relative to a determined transponder in order to make it possible to place the barycentres of each of these transponders in sequential order.
  • a verification of the consistency of the inventory is also carried out by comparing the number of objects inventoried in a determined zone of the said warehousing structure with the number of locations available in the said determined zone.
  • the presence or absence of an object in each of the locations of the said warehousing structure is determined.
  • FIG. 1 is a schematic view of a system for producing location-based inventories according to the invention used on a pallet rack in a goods storage workshop,
  • FIGS. 2 and 3 illustrate the various steps of the inventory data acquisition and processing method
  • FIG. 4 shows an example of the positioning of the objects from the collected inventory data.
  • FIG. 1 shows very schematically a goods warehouse comprising a warehousing structure or pallet rack 10 surmounting a picking zone 12 in which the orders are prepared.
  • the goods are placed in their allocated pallet rack location by means of a forklift truck 14 which a forklift truck driver can then move in front of all the locations of the pallet rack.
  • a forklift truck 14 which a forklift truck driver can then move in front of all the locations of the pallet rack.
  • the pallet rack consists of several rows (for example 16 A, 16 B, 16 C) attached at determined heights on vertical uprights, for example 18 A, 18 B, 18 C, 18 D.
  • each bay 20 A, 20 B, 20 C formed between two successive vertical uprights comprises a determined number of locations, for example 22 A, 22 B, 22 C.
  • the distances between two successive rows and between two vertical uprights may or may not be identical.
  • Each pallet comprises a radiofrequency transceiver (RFID Tag 24 ) positioned either on the support itself or on the goods.
  • RFID Tag 24 serves as an identification both of the pallet and of its content (to allow for example the management of the stock and of the replacements and for keeping the cost accounts of the warehouse).
  • RFID transponder that conventionally comprises memory means may for example be incorporated into a label affixed to the plastic covering surrounding the pallet, preferably always substantially in the same determined location, in height and width, relative to the standardized dimensions of the pallet.
  • each vertical upright of the warehousing structure is furnished at each row with a radiofrequency transceiver (RFID Tag 26 ) designed for locating the pallets.
  • RFID Tag 26 a radiofrequency transceiver designed for locating the pallets.
  • an RFID location transponder is provided in all three pallet locations.
  • any other configuration, with or without identical numbers per row, can be envisaged.
  • all these transponders are placed at one and the same predetermined height.
  • the system according to the invention to comprise an ultrasound sensor 27 or any other equivalent presence detection means to detect the presence or absence of a pallet at each of the locations of the pallet rack.
  • this presence detector is placed on the forklift truck 14 but a placement at each location of the pallet rack can also be envisaged.
  • a lock-on device 28 A preferably with optical transmission/reception, which has a lock-on marker 28 B on each of the two end vertical uprights of each row, is provided on the forklift truck (or a robotized device performing the function thereof), to allow a precise positioning of the interrogation means 30 carried by the forklift truck or the robotized device.
  • the radiofrequency read/interrogation means with which this truck is provided are designed to interact with the transponders of each pallet 24 and the location transponders 26 , in order to allow a complete, rapid and reliable geographic-location-based inventory of the warehousing structure. Therefore, by detecting both the location and pallet transponders, it is possible to identify without possible error the precise location (positioning) of each pallet on the pallet rack.
  • This RFID reader/interrogator conventionally comprises transceiver means formed of one or more antennas specially adapted for RFID transmissions, for example of the parabolic type, with rectangular waveguide or with planar array.
  • This radiofrequency antenna is coupled, as is known, to a self-energized electronic module comprising a radiofrequency source and electronic components (power supply, modulator, detectors converter, processing unit) necessary for remotely supplying the transponders and for storing identification information exchanged between the electronic module and the transponders.
  • the information received to produce the inventory of the warehoused objects may be processed in real time totally or partly in the processing unit of the RFID reader/interrogator or off-line outside the latter.
  • the radiofrequency antenna may also serve as a relay for a master transceiver assembly, as described for example in U.S. Pat. No. 5,936,527, directly connected to a remote data processing assembly 32 capable of producing this inventory and of managing the warehouse via an internal database.
  • the RFID reader/interrogator incorporates short-range wireless transceiver means 30 A, of the Bluetooth or WiFi type for example, in order to retransmit the information received from the transponders (and from the status data of the presence detector) for the purpose of producing the inventory to this data processing assembly then comprising a compatible wireless transceiver means to receive this information.
  • the first step 100 of the inventory consists in placing the forklift truck in front of a first upright at one end of the first row 16 A in order to allow the lock-on device to position the RFID reader/interrogator at a predetermined height ensuring an optimum read of the transponders, that is to say at a height corresponding to that of the location transponders on which the transponders of the pallets are preferably aligned.
  • the truck may then, in a subsequent step 102 , pass in front of the warehousing structure all along the first row, in order, as is known, to acquire the data read from the transponders.
  • the status data delivered by the presence detector are also acquired (step 104 ).
  • acquisitions of new data are disabled (zone with no read Z 0 in FIG.
  • the data of the transponders and the status data of the second row are acquired before the truck turns round again at the end of this new row.
  • the process is repeated in this way for all the rows of the warehousing facility up to the last upright 18 D of the last row 16 C (step 112 ) after which the acquisition of the data necessary for the inventory is terminated and the truck may return to its initial position (step 114 ).
  • these data accumulated in the memory means of the reader/interrogator are then either processed totally or partly in real time directly by the processing means of the RFID reader/interrogator or transmitted to the remote management data processing assembly 32 which carries out off-line processing. It will be noted however that, depending on the storage capacity of the RFID reader/interrogator, the data may also be transmitted gradually as these data are read.
  • FIG. 4 shows as an illustration the processing with reference to FIG. 1 of the last bay 20 C of the first row 16 A and that of the first location 22 C situated on the row 16 B immediately above.
  • the location and pallet transponders are read several times during the movement of the truck (see for example in FIG. 4 the five reads of the first location transponder or the 13 reads of the first pallet transponder) and one and the same transponder can be read during the pass in front of two superposed rows or in front of two adjacent bays (see for example in FIG. 4 the double read of the transponder of the second pallet of the last bay during the pass in front of the first pallet of this same bay and the read of a pallet transponder of the second row during the pass in front of the first pallet of the first row).
  • a second filtration can then be carried out in a step 118 consisting in the generation of a weighted average of the reads relative to a determined transponder in order to make it possible to place the barycentres of each of the location or pallet transponders in sequential order. Therefore, each transponder is positioned in time and relative to the others, particularly relative to the location transponders (see in FIG. 4 , the various positionings thus obtained from P 10 to P 21 ).
  • a subsequent step 120 the data originating from the presence detector are analyzed in order to determine whether a zone with no transponder read (or with insignificant reads as illustrated in FIG. 4 at the third location of the last bay of the first row) corresponds to an empty location, that is to say left with no pallet, or to the presence of a pallet whose transponder is defective and therefore inactive. Specifically, if the detector detects the presence of an obstacle, it is that a pallet with no transponder is stored in the corresponding location, otherwise it is that this location is empty (see in FIG. 4 , the last location of the last bay of the first row).
  • each bay does not contain more pallets than there are locations, that is to say that the number of inventoried objects in a determined zone of the warehousing structure, in this instance a bay, matches the number of locations available in this zone, in this instance three in the example of the pallet rack of FIG. 1 (but this number is in no way limiting).
  • an inventory in a warehouse of an express parcel carrier may be produced in two hours with two forklift truck drivers instead of three days with several handlers each furnished with a barcode reader.

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US11/847,744 2006-08-31 2007-08-30 Automated system for producing location-based inventories Active 2029-04-19 US8031070B2 (en)

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FR0653522 2006-08-31
FR0653522A FR2905493B1 (fr) 2006-08-31 2006-08-31 Systeme automatise de realisation d'inventaires localises

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US9747480B2 (en) 2011-12-05 2017-08-29 Adasa Inc. RFID and robots for multichannel shopping
US10050330B2 (en) 2011-12-05 2018-08-14 Adasa Inc. Aerial inventory antenna
US20190163942A1 (en) * 2017-11-29 2019-05-30 Symbol Technologies, Llc Operations of mobile rfid readers in a venue having fixed rfid readers
US11093722B2 (en) 2011-12-05 2021-08-17 Adasa Inc. Holonomic RFID reader
IT202200019737A1 (it) * 2022-09-26 2024-03-26 Komete Smart Factory Made Easy Srl Sistema e metodo per la determinazione della posizione di oggetti o lotti all’interno di un magazzino
WO2024069414A1 (fr) * 2022-09-26 2024-04-04 Komete Smart Factory Made Easy Srl Système et procédé de suivi d'objets ou de lots dans un environnement de travail

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CN101891052A (zh) * 2010-03-30 2010-11-24 江苏六维物流设备实业有限公司 基于rfid的堆垛机货物快速盘点新技术
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EP2608103B1 (fr) 2011-12-23 2014-02-12 Neopost Technologies Dispositif de détection de la présence de RFID
US9898632B2 (en) 2013-05-20 2018-02-20 Nec Corporation Article management system, article management method, and non-transitory computer readable medium storing article management program
JPWO2015004897A1 (ja) * 2013-07-10 2017-03-02 日本電気株式会社 物体検出システム、物体検出方法及び物体検出プログラム
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FR3017214B1 (fr) * 2014-02-04 2017-07-21 Ubiquid Systeme de verification de rangement et de localisation d'objets munis d'une etiquette rfid
US9235740B1 (en) 2014-12-15 2016-01-12 Amazon Technologies, Inc. Automatic drawer state detection
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US10134253B2 (en) 2015-06-04 2018-11-20 Tyco Fire & Security Gmbh Systems and methods for locating and determining the orientation of a handheld device
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EP3121618A1 (fr) * 2015-07-22 2017-01-25 Lorenz Edtmayer Dispositif d'affectation de la position d'un appareil mobile
CN105868801A (zh) * 2016-03-24 2016-08-17 上海申腾信息技术有限公司 一种基于条码读取定位的跟踪锁定rfid识别融合***及方法
EP3339238B1 (fr) * 2016-12-23 2023-09-20 The Raymond Corporation Systèmes et procédés de détermination d'une étagère, pour véhicule de manutention de matériaux
FR3061973B1 (fr) * 2017-01-16 2022-02-11 Wid Procede de gestion d'un conteneur a bouteilles et systeme associe
JP6789144B2 (ja) * 2017-02-07 2020-11-25 ユーピーアール株式会社 物品位置管理システム
GB202002868D0 (en) * 2017-08-31 2020-04-15 Agency Science Tech & Res Method of inventory control and system thereof
CN109176241B (zh) * 2018-07-26 2021-08-31 深圳市东方碳素实业有限公司 石墨模具毛坯的上料方法及石墨模具的制造方法
JP7084257B2 (ja) * 2018-08-30 2022-06-14 株式会社日立製作所 ピッキング支援システムおよび支援方法
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US11093722B2 (en) 2011-12-05 2021-08-17 Adasa Inc. Holonomic RFID reader
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US10762312B2 (en) * 2017-11-29 2020-09-01 Symbol Technologies, Llc Operations of mobile RFID readers in a venue having fixed RFID readers
IT202200019737A1 (it) * 2022-09-26 2024-03-26 Komete Smart Factory Made Easy Srl Sistema e metodo per la determinazione della posizione di oggetti o lotti all’interno di un magazzino
WO2024069414A1 (fr) * 2022-09-26 2024-04-04 Komete Smart Factory Made Easy Srl Système et procédé de suivi d'objets ou de lots dans un environnement de travail

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EP1898341B1 (fr) 2010-12-29
EP1898341A1 (fr) 2008-03-12
FR2905493B1 (fr) 2008-12-05
DE602007011545D1 (de) 2011-02-10
FR2905493A1 (fr) 2008-03-07
US20080055088A1 (en) 2008-03-06

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